Using three different laser systems, we demonstrate a convenient and simple plasma based diagnostic of the contrast of high-power short-pulse lasers. The technique is based on measuring the specular reflectivity from a solid target. The reflectivity remains high even at relativistic intensities above 1019 W/cm2 in the case of a high-contrast prepulse-free laser. On the contrary, the specular reflectivity drops with increasing intensities in the case of systems with insufficient contrast due to beam breakup and increased absorption caused by preplasma.

Recent progress in the development of edge-emitting and surface-emitting photonic-crystal distributed-feedback lasers is reviewed. For an edge-emitting device with a mid-IR â€œwâ€ active region, the beam quality is no worse than 8 times the diffraction limit for stripes as wide as 600...

The authors reflect upon the present status of diode-pumped solid-state lasers in various technological and scientific purposes. They state that solid-state lasers are being used as a source of coherent radiation for continuous wave and pulse operations and mention that the next generation of...

The article focuses on a research which found that graphene has extraordinary electrical properties that could be used for the development of highspeed optoelectronic devices like photodetectors, optical modulators and solid-state lasers.

A strategy to contact organic lasers is proposed. Without the need for thick transport layers that keep the optical mode away from the contacts waveguide losses similar to those of structures without contacts can be achieved. The key to this concept is to position the contacts in the intensity...

Reports on the first Raman laser that is electrically-driven and requires no external optical pump. Combination of nonlinear optical devices and semiconductor injection lasers; Difference from conventional solid-state Raman lasers that rely on photon energy from an external optical pump.

The article provides information on the application of fiber lasers in stent cutting and solder mask stencil cutting. Stenting involves the insertion of laser cut into a fine wall wire mesh-like structure. Fiber lasers have an edge in such process because it produce low-taper, high aspect ratio...